XbiotechXBIT
13F holders, Q1 2026 (March 31)At the end of Q1 2026, 37 institutions reported holding Xbiotech Inc. (XBIT) in their 13F filings, down 4 from Q4 2025. 3 opened new positions and 7 sold out. The largest holders were BlackRock, Inc. ($689K), Geode Capital Management, LLC ($543K) and Vanguard Capital Management LLC ($472K). 2 famous investors held it, including Israel Englander (0.0% of Millennium Management's portfolio) and Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio).
- Company
- Xbiotech Inc.
- CUSIP
- 98400H102
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 3 | $53K |
| Exits | 7 | $545K |
All 13F filers, Q4 2025 → Q1 2026: 50,003 shares bought and 322,860 shares sold, net −272,857 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 37 holders
| BlackRock, Inc. | 0.00% | Add +1.6% | 293,104 | $689K |
| Geode Capital Management, LLC | 0.00% | Add +4.5% | 231,020 | $543K |
| Vanguard Capital Management LLC | 0.00% | — | 200,971 | $472K |
| RBF Capital, LLC | 0.02% | No change | 198,501 | $466K |
| Morgan Stanley | 0.00% | Add +1.3% | 165,554 | $389K |
| Millennium Management | 0.00% | Reduce -22.1% | 105,540 | $248K |
| Bridgeway Capital Management, LLC | 0.00% | Add +9.9% | 98,447 | $231K |
| Vanguard Fiduciary Trust Co. | 0.00% | — | 91,576 | $215K |
| Northern Trust Corp. | 0.00% | Reduce -0.5% | 76,087 | $179K |
| State Street Corp. | 0.00% | No change | 73,006 | $172K |
| Jane Street Group, LLC | 0.00% | Reduce -13.8% | 60,100 | $141K |
| Empowered Funds, LLC | 0.00% | No change | 59,547 | $140K |
| Squarepoint Ops LLC | 0.00% | Reduce -35.6% | 41,214 | $97K |
| Bank of New York Mellon Corp | 0.00% | Reduce -18.8% | 39,355 | $92K |
| Bank of America Corp. | 0.00% | Add +2.2% | 36,689 | $86K |
| Dimensional Fund Advisors LP | 0.00% | Reduce -28.9% | 36,053 | $85K |
| Connor, Clark & Lunn Investment Management Ltd. | 0.00% | Reduce -5.2% | 28,663 | $67K |
| BNP Paribas Financial Markets | 0.00% | Add +1.1% | 27,164 | $64K |
| National Bank of Canada | 0.00% | No change | 25,000 | $59K |
| Renaissance Technologies | 0.00% | New | 22,438 | $53K |
| American Century Companies Inc. | 0.00% | No change | 18,881 | $44K |
| Qube Research & Technologies Ltd | 0.00% | Reduce -9.3% | 18,691 | $44K |
| XTX Topco Ltd | 0.00% | Reduce -17.5% | 17,901 | $42K |
| Pinnacle Financial Partners, Inc. | 0.00% | No change | 11,796 | $28K |
| Vanguard Global Advisers, LLC | 0.00% | — | 7,009 | $16K |
| UBS Group AG | 0.00% | Reduce -0.5% | 5,035 | $12K |
| Rhumbline Advisers | 0.00% | No change | 928 | $2K |
| Royal Bank of Canada | 0.00% | Add +539.3% | 1,189 | $2K |
| McIlrath & Eck, LLC | 0.00% | No change | 753 | $2K |
| Jones Financial Companies LLLP | 0.00% | No change | 370 | $840 |
| JPMorgan Chase & Co. | 0.00% | Reduce -91.5% | 96 | $218 |
| SBI Securities Co., Ltd. | 0.00% | Add +3600.0% | 37 | $87 |
| Larson Financial Group LLC | 0.00% | No change | 21 | $49 |
| Arax Advisory Partners | 0.00% | New | 15 | $35 |
| Cwm, LLC | 0.00% | Reduce -43.5% | 13 | $31 |
| Caitong International Asset Management Co., Ltd | 0.00% | New | 11 | $26 |
| Optiver Holding B.V. | 0.00% | No change | 8 | $19 |
"% of holder's portfolio" is XBIT's weight in each manager's 13F, not the share of Xbiotech Inc. the manager owns.